Electric liquid-heater.



O. H. FIDDES.

ELECTRIC LIQUID HEATER.

APPLICATION FILED MAR. a, 1909.

945,027, Patented Jam 4, 1910.

WITNESSES IN VEN TOR.

OSCAR H. FIDDES, OF SAN FRANCISCO, CALIFORNIA.

ELECTRIC LIQUID-HEATER.

Specification of Letters Patent.

Patented Jan. 4:,

Application filed March 6, 1909. Serial No. 481,835.

To all whom it may concern:

Be it known that I, ()scan H. F moss, a citizen of the United States,residing at San Francisco, in the county of San Francisco and State ofCalifornia, have invented new and useful Improvements in ElectricLiquid- Heaters, of which the following is a specification.

The object of the present invention is to provide an electricfluid-heater which may be made portable and in which a given amount offluid may be very rapidly heated entirely separate from the main body orsupply reservoir, and which will be simple in construction, convenientin operation, and not liable to get out of order.

\Yith these ends in view my invention consists in the details ofconstruction and combination of elements hereinafter set forth, and thenspecifically designated by the claims.

In order that those skilled in the art to which this inventionappertains may understand how to make and use the same, I will describeits construction and operation in detail, referring by number to theaccompanying drawing, forming a part of this specification, and in which3 The figure is 'a central vertical section of my apparatus. i

In referring to the drawing, I have shown a reservoir or supply tankwhich may be of any desired size, shape and proportions. A heatingreservoir or chamber 3 is located below the bottom of the reservoir 1 inwhich the fluid from the reservoir is heated. A pipe or tube 2screw-threaded on both ends connects the bottom of the heating-chamher 3with the bottom of supply reservoir 1 by means of a screw-threaded nut 9whici forces downon the washer 1O forcing the bottom ZOfthG supplyreservoir 1 down upon the packing'ring 11 and the flange 12 making awater tight connection, the ipe 2 making a free passage'for the hqui.from the supply reservoir 1 to the bottom of the heating-chamber 3. Avent-pipe 5 is shown connecting to the top of the heating-chamber 3 andextending upward to a point above the top of the reservoir 1. Astop-cock 4 is shown connecting to the vent-pipe 5 at a oint above thebottom of the reservoir 1 and 1s the means by which the heated liquid isdrawn off from the heatin -chamber 3. The heating-element consists o? asingle layer of naked high-resistance wire 6, so wound that thecontinuous turns of the wire out contact with each other so as toprevent short-cireuiting. The ends of the resistance-- Wire; 6 areconnected or anchored to two clamps 8 shown at each end of the heatingcoil which are insulated from the walls of the heating-chamber by meansof the insulation 7. The insulation 7 consists of a thin layer of ahigh-resistance material such as sheet mica, which will not materiallyinterfere with the passage of the heatfrom the coil to the walls of thechamber An ordinary electric light 13 is connected in multiple with theheating-coil (3 by wires it) which lead from the lamp l3 and connect toeach oi the clamps or binding-posts 8. means of wires 15, current isconducted to the heating coil 6. A switch 14 is inserted in circuit withone of the wires 15 and completes or opens the circuit which conductsthe current for heating the coil 6.

The operation of this apparatus will thei, be as follows: The reservoir1 is first. fillewith water or such iinid that is required to be heated,which flows by gravity d wn the pipe 2- filling the heating-chamber 3and then seeks its level in the vent-pipe The current is then turned onby means of the switch 14, heating the coil 6 and lio'hting the lamp i3apprising the user that the apparatus is in operation. In a short 5; aceof time, which will be in proportion to the size of the heating-chamber3 and theamount of current consumed by the coil 6 the fluid in thechamber 3 will begin to boil. By means of the stop-cock e} on thevent-pipe 5 the heated liquid can be drawn oil the heating-chamber 3 andwill be replaced by" an equal amount of cold from the reservoir 1 whichcan in the same space of time be heated and drawn likewise from the stopcock 4. The top of the heating-clniuiber 3 out of communication with thereservoir 1, the vent-pipe 5 heating-chamberS and the stopcock i:connecting to the vent-pipe 5 at a point above the bottom of reservoir 1form the main features of this invention. It is evident that if the topof the heating-chamber 3 was 1;

connected to or in any way connnunicated with the reservoir 'l the steamwhich would be generated in the heatingclianiber would naturally rise tothe top and discharge and.

condense into the reservoir 1. The object of i.

having the heating-ehamber out of any communication with the reservoir 1is to confine leading from the top of the entire heating energygenerated by the heating-coil 6 to the 'l'lrkl in the heatingchamber 3.If any steam could escape throi i any connection to the reservoir 1 5the heating energy of the steam would be taken the cooler liquicl in thereservoir which would greatly lower the efficiency of this apparatus.

it is 015 the very essence of this invention that th:heating-chambershoulclbe connected to atmosphere, by means of aventpipe, for

the purpose off relieving the pressure Which would he gei'ieretecl. inthe heating-chamber viclent that if the vent-pipe Was not the liquidwhen boiling would earn, which would rise to the top GIQUlLLZi S "ChQlbQl 3 and back the o k 'Wll'lCll would. en-

7 ply the heatingchmnber 3 and pro- (luce excessive heating of theheutiz'lg-hhainher and heating-element 6, and on pening the stop-cocla:st ewn, instead of liquid voultl llow therefrom. the top of the heatingchamber 3 as not connected to atmosphere by means Or the vent-pipe 5this apparatus would he impracticable as the heating-chainher we 1econtain sir ml. the fluid could not readily now down in o theheating-chamber 3 on being filled for the ii llIlQ. The stop- 39 cool;being connected to the vent-pipe 5 at a, point shove the bottom thereservoir 1 is to produce means by which a portion of the may beretained in the bottom of the reservoir 1 so than the heating-chamber 3may contain liquicl in case by neglect the operator would leave thecurrent turned on when the liquid was down to the level of thestop-cool: 4t.

Many variations may be made in the form of the device from that hereshown Wit out l. The

placed any plare on the in stop-cool; may be vent= 3e JL 0 Mm 1. In anelectric iquitl heater, the con'ihh notion ol a liquid healing chainlwr,o coil ol? resistance Wire urouncl the same, a res rvoir above theheatingchandler a pipe commuting; the bottom of the reservoir to thebotl'OlIl of the heating ?chamber and a vault-pipe leading from the topof the heating-elmmbcr to the atmospl'iere above the top of the res ervoir substantially as described.

2. in an electric liquid heater, the combi-- notion of a liquid healingchamber: .1. coil of resistance wire arounrl the some, a ltfSPi'YUliabove the heating-chanil er, a pipe eouneeo ing the bottom or the rvoirto the hot- .to1n of the heating 'nber. a veuopipe atingychamlleileading from the top or in n. to the atmosphere above he ton of voir,and a stop-cool; on the venlqupe ubme the bottom of the reservoirsul'nsluntially as m In described.

C" v T. 1 can riancisco, 1 ebi uaix I USU ill, ll. Signed in thepresence oi? lVlLnmir i1 i1 men 'EROMAS llhummrron,

